package com.gxuwz.security;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.apache.log4j.Logger;
import org.springframework.security.access.SecurityMetadataSource;
import org.springframework.security.access.intercept.AbstractSecurityInterceptor;
import org.springframework.security.access.intercept.InterceptorStatusToken;
import org.springframework.security.web.FilterInvocation;
import org.springframework.security.web.access.intercept.FilterInvocationSecurityMetadataSource;

/**
 * 自定义的拦截器
 * <p>
 * 功能描述：拦截用户的请求
 * <p>
 * @author Timo
 * @date:2018年5月20日
 */
public class MyFilterSecurityInterceptor extends AbstractSecurityInterceptor implements Filter {

	private final Logger log = Logger.getLogger(getClass());
	private FilterInvocationSecurityMetadataSource metaSource;

	@Override
	public void destroy() {
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
	
		log.info("security自定义拦截器");
		FilterInvocation fi = new FilterInvocation(request, response, chain);
		invoke(fi);
	}

	public void invoke(FilterInvocation fi) throws IOException, ServletException {

		InterceptorStatusToken token = super.beforeInvocation(fi);
		try {
			fi.getChain().doFilter(fi.getRequest(), fi.getResponse());
		} finally {
			super.afterInvocation(token, null);
		}

	}

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
	}

	@Override
	public Class<?> getSecureObjectClass() {
		return FilterInvocation.class;
	}

	@Override
	public SecurityMetadataSource obtainSecurityMetadataSource() {
		return this.metaSource;
	}

	public FilterInvocationSecurityMetadataSource getMetaSource() {
		return metaSource;
	}

	public void setMetaSource(FilterInvocationSecurityMetadataSource metaSource) {
		this.metaSource = metaSource;
	}

}